Railway car truck



July 3 1945 i B. HAvsl-:LTINE 2,379,521

RAILWAY CAR TRUCK Filed May \19, 1943- *ffy WM- 4@ Patented July 3, 1945Stacy. `BHaseltine, ELallfGrralvlge,` Ill., assignortofv l WrH. .MinenInc., Chica g o,-Ill.,V a corporation ofl Delaware n k `Application May19, 1943;.seria1n5487544 o '5 olainqs. tarios-rn This-invention relatesto improvementsmraip way cargtrucks; f

supplemental'to the usualv truck springs cifra railway car truck forsnubbi'ng or dampeningz the action of the springs, lthereby reducing theoscillations and.' vibrations ofthe same `to such an eX- tent that'thecar and its lading will be protected against damage.

Another ofbj'ect of the invention is to pro-vide a snubbing meanscomprising relativelyI YA'slidalole friction elements movable withthe:bolster of the car and interposed between the holster and! bolsterguides of the' truck side frames? and having frictional' slidingengagement with the guideawherein the friction elements areprovided'with angul'arly projecting flanges disposed-'between theunderneath side ofthe bolster andthe truck springs andI having rockingengagement with saidund'erneath'- side of the bolster, whereby thepressure exerted by the Springs rocks the friction? elements I outwardlyto press the same against the bolster guides; l I

Other objects of the invention willm'ore clearly appear from thedescription and claims hereinafter following. 4 i' f I f In the drawingforming a part-,of this specification, Figure 1 isa vertical sectionalView through one of the side frame members of` a railway car truck,illustrating my improvements' in connection therewith, the side frameIbeing partly broken away, said View' Acorresponding substantiallyto theline I'-I of Figure 2". Figure2`is aj'horizontol sectional View,corresponding .substantially to the'v line 2-2Y of Figure l. Figure 3'is la perspec`V tive view of a frictionplate elem-ent employed. in

my improvedrailway car truckl structure:

In saidV drawing, I indicates one of the side frame members of yarailway car truck. The side frame I0, as shown, is in the form ofacasting and has top land bottom members I Il and k'I2 c o-n.- nected byspaced vertical sections I3-I 3 forming guides for the truck bolster. Aswillloe'under'- stood by those skilledn in thisv art, thejtruck includestwo side frame memlbers I-,IO-a truck bolster I 4, a transverselydisposed spring plank One object of the inventionv is to provide means vbetween each truck springcluster and' the spring plank;- y lyfln'c'arrying *outmy invention Iv 'provide thel usual topspring"foilowerplate 20 and a-pair of rockablel friction elementsy A-'Awhich have sliding engagement with the bolster guides of the truck` sideframes and with which vthe truck vsprings cooperate to press the sameagainst said guides.

vThe top and bottom spring plates '20 and I9 are of the usual typeemployed in railway car,

trucks and bear respectively on the top and bottom 'ends of the springsIB-IG-IS-IG, each plate having the usual projecting bosses` 2I`2I forcentering the sprimgs. I

' The rocking friction elements -A are of like l design-,- eachcomp-rising a relatively wide baselike foo-t portion`22 of substantiallyrectangular outline and an upstanding platelike' portion 23 at f theouter edge of the base. The corners of the 'baseare preferably rounded,as shown'm'ost clearly in Figure 3. The plate portion 23' is of lesserwidth thanthe lbase 22 and the kbase portion projeots'beyond theopposteside ends ofthe plate The elements `AA are disposed at ppjO-site sidesof the lbolster, with the :base portions 224-22 thereof interposedbetweenthe underneath face v ofthe bolster and the top spring followerplate.

2, 'and the platelikeA sections 23^23b interposed between the sidesofthe Ibolster I4 and the bolster guids mi .AS "ShOWIl' in' Figures l andy2,A the 'bolster guide seats t8 have inset portionsor pook# ets -24L24which-accommodate the plate sections 23"- 23L 4The plate section 23 of`each element is ofA lesser height than t-hevertical thickness of Ithebolster I4' and `corresponds in width-.to the usual wear plate 25(covering the same.

ments A-A are inclined to the horizonta1, 'as

shown in Figure l, that is, the yfoo't or base por; i tion 22 of eachelement is disposed at an angle to `the plate section thereofwhich isslightly greater than a'right angle.' The base portions'are thru'sinclined downwardly and inwardly away from the I5 `connecting the twoside frame members 'and supported at opposite'ends on the bottommemb'ers Iii-I2 ofthe side frames Ille-I0, and truck I springs I6-I6.'I'he bolster Il'has itsoppositev bottom spring follower plate I9 :beinginterposed underneath si'de ofthe bolster, thereby providing for rockingengagement between the elements Ae-'A and the underneath side of thebolster.

rEach baseportion 22 is of such a width that it overlies two of thesprings of the spring cluster;

that is, the two springs at the corresponding4 side of the bolster.Suflicient clearance is provided between the opposed -inner edges of thebase por- `danger of contacter binding of the bases tions of the pair offriction elements'to 'permit rocking ,ofthe'bases toward the bolster"without with each other. i

As will be evident, the flanges or base portions 22-22 of the elementsA-A'are subjected to the pressure of the springs IE-IB and the tendencyis to rock these elements outwardly toward the bolster guides to pressthe friction surfaces of the plate sections 23-23 thereof into tightfrictional contact with the friction surfaces provided by the wearplates 25-25.

The operation of my improved dampening device is as follows: Uponrelative vertical movement of the bolster I4 with respect to the side'frame l0, the coils of the cluster or group of springs lli-i6 arecompressed between the bolster and the spring plank. At the same timethe friction elements A-A are forced to slide vertically along thebolster guides, moving in unison with the bolster I4. A frictionsnubbing action is thus produced during compression of the springs.During recoil of the springs, the friction elements A-A move upwardlywith the bolster l4, and due to frictional engagement with the guideslI-il dampen the recoil action. During both compression and expansion ofthe truck springs the friction elements are urged into tight frictionalcontact with the friction surfaces of the bolster guides by the actionof the springs which exert pressure on the base flanges 22--22 of saidelements A-A to rock the latter outwardly away from the bolster.

As will be evident, as the springs are being compressed the frictionalresistance produced by movement of the elements A-A with respect to thebolster guides is augmented due to the' in- ,creased pressure of thesprings on the base flanges or arms 22-22. As the springs recoil, thefrictional resistance Vis progressively reduced due to the reduction ofthe spring pressure on the rocking friction elements.

I have herein shown and described what I now consider the preferredmanner of carrying out my invention, but the same is merely illustrativeand I contemplate all changes and modications that come within the scopeof the claims appended hereto.

I claim: v

1. In a railwayv car truck including a truck side frame having spacedbolster guides, the combination with a vertically movable bolster havinga horizontally disposed underneath surface; of a'cluster of springssupporting said bolster; and rocking friction elements movable with thebolster, said friction elements having friction plate portionsinterposed between the bolster and bolster Yguides and slidably engagingthe bolster guides, said elements having base portions having engagementwith and fulcrumed directly on said underneath surface of the bolster,at opposite sides of the latter, and acted on by the springs rto rocksaid plate portions against the guides.

v2. In a railway car truck including a truck side frame having spacedbolster guides, the combinationwith a vertically movable bolster havingits underneath side at right angles to said guides; of a pair offriction elements movable with the bolster, each of said elements havingan upright friction plate section of uniform thickness throughout itslength, said plate section being interposed between the correspondingside of the bolster and the cooperating bolster guide, and a flat baseflange of uniform thickness throughout its length projecting beneath thebolster integral with the plate section and bearing on the underneathside of the bolster, said base `the combination with a verticallymovable bolster having its underneathk surface disposed at right angleto said guides; of a cluster of springs supporting the bolster on theside frame; and a pair of friction elements at opposite sides of thebolster, each of said elements having a flat upright friction platesection and a flat base flange at the lower end of said plate sectionintegral therewith, said base flange being angularly disposed to saidplate section, the angle between said flange and plate being greaterthan a right angle, said friction plate being interposed between thecorresponding side of the bolster and the adjacent vertical bolsterguide and having sliding frictional contact with said guide, said baseflange projecting beneath the bolster and bearing at its outer endportion on the underneath side of the latter and being interposedbetween the springs and the bolster.

4. In a railway car truck including a truck side frame having spacedbolster guides, the combination with a vertically movable bolster havingpockets at opposite sides thereof opposed to the bolster guides of theside frame; of a cluster of springs supporting said bolster on the truckside frame; and a pair of friction elements having upstanding platesections accommodated in said pockets of the bolster, said plates havingsliding frictional engagement with the bolster guides, said elementshaving laterally, inwardly projecting base flanges at the lower ends ofsaid plate sections, integral with the latter, said base flanges beinginterposed between the underneath side of the bolster and the top end ofsaid spring cluster, said flanges having the top surfaces thereof whichcontact the bolster disposed at an angle to the upstanding sectionsthereof, which angle is greater than a right angle.

5. In a railway car truck including a truck side frame having spacedbolster guides, the combination with a vertically movable bolster, saidbolster having a substantially fiat underneath surface; of a cluster offour springs supporting said bolster on the side frame; and a pair ofrocking friction elements at opposite sides of the bolster movabletherewith, said friction elements having upstanding plate portionsinterposed between the bolster and the bolster guides and slidablyengaging said guides, said elements having laterally inwardly projectingbase portions extending beneath the bolster, the base portion of one ofsaid elements being interposed between the upper ends of two of saidsprings and the bottom of the bolster at the corresponding side of thelatter, said base portion and the underneath surface of the bolsterdiverging inwardly, andthe base portion of the other of said elementsbeing interposed between the upper ends of the remaining two of saidsprings and the bottom of the bolster at the corresponding side of saidbolster, said last named base portion and the underneath surface of thebolster diverging inwardly.

STACY B. HASELTINE.

